Engine and personal watercraft

Details Engine and personal watercraft Engine and personal watercraft

2006-03-28

2006-03-28

Yuen, Henry C. (Department: 3747)

Internal-combustion engines

Cooling

With jacketed head and/or cylinder

C440S08800J

Reexamination Certificate

active

07017532

ABSTRACT:
An engine for a personal watercraft uses an open-looped cooling system and comprises a cylinder block having a water jacket within which cooling water flows, and a piston that reciprocates within the cylinder block, and a dimension of the water jacket in a reciprocation direction of the piston is equal to or less than a half of a reciprocation distance of the piston.

REFERENCES:
patent: 4294203 (1981-10-01), Jones
patent: 6312300 (2001-11-01), Asai
patent: 6752672 (2004-06-01), Kanno
patent: 6793546 (2004-09-01), Matsuda
patent: 1479139 (1977-07-01), None
patent: HEI. 2-100896 (1990-08-01), None
patent: HEI. 5-32296 (1993-04-01), None

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